I have been having my engine rebuild since last year after the spark plug ends going through the engine. so i have changed a couple of things to make more power the problem i have got now is do i risk it and build it all back together with the standard clutch like it has been doing with 400bhp and never slipped ones are let me down or do i go down the route iff finding a clutch to take more power and save the work load by taking the engine out. What uprated clutches are there on the market which will take 450 to 500 bhp any info would help thanks